Our Cairns, Ollie and Pepper, have the typical love/hate relationship. She tries to be the alpha, but since he has been with us for 6 yrs, he's not letting her have her way. She's always angling to stand on his head and sit on him, but he's not giving up the title of top dog in the household to 10-month-old baby dog she-devil.
However, the longer she lives with us, the more leeway he allows her with what has always been his. The co-sleep baby bed next to our king has been Ollie's sleeping space for over two years now. However, she's starting to make inroads there on a couple occasions now for some little naps during the day and he's allowing it.